fairyfeller

Is there any chance to overwrite current file ? For example - i receive stock info everyday with file named "Company stock 24-05-2017.xls". i created rule for renaming it to...

Take a look at Thunderbird options - https://support.mozilla.org/en-US/kb/imap-synchronization It sync message headers and also you can limit max size of content for downloading in KBs.

Also it would be great if we can attach files right from cozy files :)

I guess primary usage of sharing belongs to Files app. And yes - mainly it's about self hosted installs. Typical scenario - making and sharing screenshots - make screenshot, put...